Transact Guard

Transact Guard is a Spring Boot application for detecting financial fraud using rule-based logic. It features user registration, login, transaction management, and real-time fraud detection, with a simple web interface powered by Thymeleaf and MongoDB as the backend database.

Tech Stack

• Java 17
• Spring Boot 3.x
• Spring Web (RESTful APIs)
• Spring Data MongoDB
• Thymeleaf (server-side HTML rendering)
• Maven
• MongoDB
• YAML-based configuration

Features

• User registration and login (username/password)
• Dashboard: view balance, transactions, and fraud alerts
• Send money to other users
• View fraud alerts triggered on your account
• Rule-based fraud detection (high amount, velocity, unusual pattern, frequency spike, duplicate transaction, failed attempts + high-value)

Data Models (MongoDB Collections)

• User: userId, username, password, accountBalance
• Transaction: id, userId, recipientId, amount, timestamp
• FraudTransaction: id, transactionId, userId, recipientId, description, timestamp
• LoginAttempt: id, userId, timestamp, success, type ("login"/"transaction")

Project Structure

- controller/
- service/
- repository/
- model/
- config/
- templates/ (Thymeleaf HTML files)

Getting Started

Prerequisites

• Java 17+
• Maven
• MongoDB (running locally on default port 27017)

Setup

1. Clone the repository:

   git clone <your-repo-url>
   cd transact-guard

2. Configure MongoDB connection in src/main/resources/application.yml if needed.
3. Build and run the application:

   mvn spring-boot:run

"# transact-guard"